We're going to turn to the world cup. More trouble in Brazil, the day before the world's biggest sporting contest kicks off. Deadly flooding, as Brazil plans to put down protests and prepare for the games. Bob woodruff has the story. Reporter: This morning, more bad luck for Brazil. Flooding near Sao Paulo Tuesday, claimed the lives of nine people. And this, subway workers hitting the streets Monday, demanding health care and housing. Police and armed guards, patrolling Sao Paulo with riot gear and tear gas. And in Rio, teachers protest, too. We are fighting for better conditions. Reporter: While the government has spent billions of dollars to host the world cup. But an even bigger problem may be that brazi is not completely prepared. Workers in Sao Paulo stadium are wushing. Toilets when we were there, were not even installed. Many Brazilians are excited about the games and are showing their team's colors, everywhere. There was good news on Tuesday. Jennifer Lopez, announcing she would, in fact, be performing at the openinger the monies after days of rumors saying she would not. I believe that we -- I believe that we will win. I believe that we will win. I believe that we will win. Reporter: Americans' spirits are running high. Celebrities, celebrating. Fans, even flying thousands of miles to Brazil to cheer on their team. I always wanted to experience the world cup. And to be able to go to Rio. Reporter: The U.S. Team practicing, focusing on what it will take to win the first game against Ghana on Monday. It's going to take a huge effort. We're going to have to be together. We're going to have to watch each other oes back. Reporter: Imagine the pressure on the Brazilian team. They're ranked number one. If they don't win tomorrow, many believe there will be a political and psychological disaster for the people here because they want to win this all, George and robin. Of course, we would love to see the Americans win, too. No question about that. Thank you, bob. ESPN will air that opening match tomorrow at 3:30. Let's get the weather.

This transcript has been automatically generated and may not be 100% accurate.

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